Well, I'm not an expert, but the Axon is not the only microcontroller that you can use for a robot. For example, a few threads ago, a guy (forgot his name) posted a link for a microcontroller for only $20. Then another guy posted others that were even cheaper.
From the way I see it, it's like buying a new Mercedes or a used VW; the first is in every way better but both go from point A to point B.
(Perhaps this is an oversimplification and I'm sorry if I offended you or your product admin